It seems to always be a struggle to give anyone credit in WW2 who isn't an America, but at least I know that Britian and Russia were actively fighting in the final weeks of the war in Europe; was France involved or were they just keeping their forces home to rebuild and maintain order? I actually don't really know much about France's involvement in the war after liberation except vaguely about colonial forces in Africa who were fighting the Germans.
The French army did take part in the invasion of Germany yes, here is a bit of context.
The French army really started to reemerge as a major force within the allies after operation Torch and the defection of the Armée d'Afrique from Vichy. General Henri Giraud, the leader of this army, engaged in a brief power struggle with De Gaulle, the leader of the Forces Françaises Libres, although the Armée d'Afrique was superior numerically De Gaulle won out in the end, mainly for political reasons as Giraud unlike him had been part of the Vichy governement and because he was seen as a yesman to the Americans.
The two forces were then merged into the Armée Française de la Libération. The effectives of this force grew slowly as the Allies and more specifically the Americans had reserves on arming it. But eventually by 1943 and the Italian campaign it was a 100 000 men strong. This force was large enough to sway Churchill against a landing in the Balkans in favor of a second landing in France when De Gaulle threatened him to pull out of Italy if he continued to oppose a landing in Provence.
The French assembled an army of 260 000 men for the landing, representing 71% of the forces present there. After the Liberation, the army grew rapidly by the incorporations of 200 000 résistants of the Forces Françaises de l'Intérieur. At first the Americans didn't want the French to take part in the invasion of Germany, but eventually they allowed it and the French crossed the Rhine under German fire in march 1945. The French were engaged in the southern part of Germany, although the least important part of the front they still distinguished themselves by capturing important cities like Stuttgart or when the 2ème DB of général Leclerc took Hitler's eagle nest. They cutted through southern Germany, blocking a potential path of escape for Germans troops to Switzerland and reaching Austria in the Tyrol region. They also took part in the invasion of German held north Italy. By the end of the war, the French Army of Liberation counted 1 300 000 men spread between land and air forces aswell as the navy.
A point on the ethnic composition of those forces. Although we traditionnaly have the image of it being an army of black africans the two largest groups were Maghrebis and Pieds-Noirs (ethnic french settled in Algeria). The percentages evolved with time, with the maghrebis representing 75% of forces in 1942, to them and black africans combined representing 50% by the campaigns in Italy and France. After the Liberation their shares of the total forces would slowly become lower and lower as more and more FFI were integrated into the army.